Ying Rongjian
College of Chemistry and Chemical Engineering, Linyi University, Linyi 276005, China.
Int J Anal Chem. 2015;2015:425084. doi: 10.1155/2015/425084. Epub 2015 Nov 12.
A kind of Sr(2+) selective resin was applied as an absorption phase to extract Sr(2+) ion from an aqueous solution, and the amount of Sr(2+) was determined using inductively coupled plasma optical emission spectrometer. Factors, including absorption time, temperature, stirring rate, salt-out effect, desorption, and the pH of the aqueous solution, were investigated to optimize the absorption efficiency of Sr(2+). Foreign ions were examined to observe their effects on the absorption behavior of Sr(2+). The optimum condition was absorption time at 20 min, pH of aqueous solution 7, temperature of 35°C, and 600 rpm stirring rate. A 10 mL solution of 0.1 mol/L HCl is used as the desorption agent. The linear range of Sr(2+) concentrations from 50 to 1200 μg/L was investigated with the slope of 183 μg/L. The limit of detection was 21 μg/L with 4.23% relative standard deviation. The correlation coefficient was found to be 0.9947. Under the optimized conditions, the concentrations of Sr(2+) in four water samples were detected by the developed method. We propose that this method effectively extracts strontium ion from environmental water samples.
一种Sr(2+)选择性树脂被用作吸附相，从水溶液中萃取Sr(2+)离子，并使用电感耦合等离子体发射光谱仪测定Sr(2+)的含量。研究了吸附时间、温度、搅拌速率、盐析效应、解吸以及水溶液pH值等因素，以优化Sr(2+)的吸附效率。考察了外来离子对Sr(2+)吸附行为的影响。最佳条件为吸附时间20分钟、水溶液pH值7、温度35°C、搅拌速率600转/分钟。用10 mL 0.1 mol/L HCl溶液作为解吸剂。研究了Sr(2+)浓度在从50至1200μg/L的线性范围，斜率为183μg/L。检测限为21μg/L，相对标准偏差为4.23%。相关系数为0.9947。在优化条件下，用所建立的方法检测了四个水样中Sr(2+)的浓度。我们认为该方法能有效地从环境水样中萃取锶离子。
